EP 1226922 B1 20060322 - Device and method for extrusion of polyethyleneterephthalate
Title (en)
Device and method for extrusion of polyethyleneterephthalate
Title (de)
Vorrichtung und Verfahren zur Extrusion von Polyethylenterephthalat
Title (fr)
Dispositif et procédé d'extrusion pour polyéthylènetéréphthalate
Publication
Application
Priority
IT MI20010152 A 20010129
Abstract (en)
[origin: EP1226922A1] Polyethyleneterephthalate extrusion equipment of material in granule form, still humid, coming from both ground recovered products and also virgin material, comprising a chassis (29), containing a co-rotating, oil-thermoregulated extruder with two screws (31, 32), which comprises a first zone (A), equipped with an opening (34) where there is an aspiration hood (35) for a first "open top" degassing, a second zone (C) where there is at least one stack (37, 38) for a further degassing, between the two zones (A, C), there being a tight zone (B), and a carrying and loading zone (E) activated by the screws (31, 32). The description also relates to an extrusion process of polyethyleneterephthalate effected in a co-rotating twin-screw extruder which comprises in a first zone (A) an "open top" degassing phase, followed by a stack (37, 38) degassing phase, between the two phases there being a tight zone which does not deteriorate the material, followed by a carrying, loading and amalgamation phase of the molten material and a final pumping phase with the extrusion of polyethyleneterephthalate. <IMAGE>
IPC 8 full level
B29C 48/04 (2019.01); B29C 48/395 (2019.01); B29C 48/40 (2019.01); B29C 48/405 (2019.01); B29C 48/535 (2019.01); B29C 48/76 (2019.01)
CPC (source: EP US)
B29C 48/04 (2019.01 - EP US); B29C 48/395 (2019.01 - EP US); B29C 48/40 (2019.01 - EP); B29C 48/402 (2019.01 - EP US); B29C 48/405 (2019.01 - EP); B29C 48/535 (2019.01 - EP US); B29C 48/767 (2019.01 - EP US); B29K 2067/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1226922 A1 20020731; EP 1226922 B1 20060322; EP 1226922 B2 20110727; AT E320906 T1 20060415; DE 60209993 D1 20060511; DE 60209993 T2 20070111; DE 60209993 T3 20120112; DK 1226922 T3 20060731; ES 2260383 T3 20061101; ES 2260383 T5 20111207; IT MI20010152 A1 20020729; PT 1226922 E 20060831; US 2002100995 A1 20020801; US 6583261 B2 20030624
DOCDB simple family (application)
EP 02075305 A 20020124; AT 02075305 T 20020124; DE 60209993 T 20020124; DK 02075305 T 20020124; ES 02075305 T 20020124; IT MI20010152 A 20010129; PT 02075305 T 20020124; US 5695402 A 20020125